Plot

All of America's TV antennas have gone missing. The culprit is an army of 6-foot-tall (1.8 m) robot mice from the moon, led by Boris Badenov. The plan, concocted by Mr. Big, is to get everyone to leave the USA. The heroes find the villains' hideout in a haunted mansion. Surprisingly, Gidney and Cloyd are the ones supplying the mice, believing that "The Big Cheese" is using them for peaceful goals.

With no more television, Bullwinkle resorts to playing the ukulele. Oddly enough, the mice are attracted to his horrible playing. An epic musical battle between Bullwinkle and Boris for control of the mice ensues.